Transforms the network shape to a raster net map and an additional raster flow map along the network.
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The input network vector should follow these guidelines:
<ul>
<li>links have to be drawn from upstream to downstream</li>
<li>confluence should be of maximum 2 elements</li>
<li>links between a junction and the next have to be a single geometry</li>
</ul>
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It can be used as an input for the drain map to force drainage directions, there is the possibility to create a shapefile of problem points to be used for 
a revision of the original vector network.
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<h3>Inputs</h3>
<ul>      
<li>the network vector map</li>
<li>the field of the attribute table of the network vector that defines the ACTIVE links, non active links will be not considered for rasterization; 
the attribute field has to have the type of a String with Yes or No as active or non active</li>
<li>the field of the attribute table of the network vector that defines the progressive ID for the features</li>
</ul>
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<h3>Output</h3>
<ul>      
<li>the file containing the flow map on the net</li>
<li>the file containing the raster network map</li>
<li>if requested, the problem point vector file</li>
</ul>
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